The subaru coronographic extreme AO (SCExAO) system

Implementation and performances of the coronographic low order WaveFront sensor

Frédéric Vogt, Frantz Martinache, Olivier Guyon, Takashi Yoshikawa, Kaito Yokochi, Vincent Garrel, Taro Matsuo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

5 Citations (Scopus)

Abstract

The Subaru Coronagraphic Extreme AO project (SCExAO) is a high performance coronagraph designed to deliver high contrast at small angular separation. For the detection of structures near the diffraction limit, an accurate control of low order wavefront aberrations - tip-tilt and focus - is essential as these aberrations create light leaks that are the source of confusion in the final science image. To address this major difficulty, we have equipped SCExAO with a specially designed Coronagraphic Low Order WaveFront Sensor (CLOWFS) using defocused images of a reflective ring located in the focal plane, that can track tip-tilt errors as small as 10-3λ/D. CLOWFS was originally designed to drive actuators in a closed-loop. Here, we show that it can also be used in post-processing to efficiently subtract the tip-tilt induced coronagraphic leaks in the final science image.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7736
EditionPART 1
DOIs
StatePublished - 2010
Externally publishedYes
EventAdaptive Optics Systems II - San Diego, CA, United States
Duration: Jun 27 2010Jul 2 2010

Other

OtherAdaptive Optics Systems II
CountryUnited States
CitySan Diego, CA
Period6/27/107/2/10

Fingerprint

Tip-tilt
Wavefront Sensor
Wavefronts
Extremes
Aberrations
Aberration
aberration
sensors
Sensors
Coronagraph
coronagraphs
confusion
Focal Plane
Post-processing
Wave Front
Closed-loop
Diffraction
Actuator
Actuators
High Performance

Keywords

  • Adaptive optics
  • CLOWFS
  • Coronography
  • Extrasolar planets
  • PIAA
  • SCExAO
  • Subaru telescope

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Vogt, F., Martinache, F., Guyon, O., Yoshikawa, T., Yokochi, K., Garrel, V., & Matsuo, T. (2010). The subaru coronographic extreme AO (SCExAO) system: Implementation and performances of the coronographic low order WaveFront sensor. In Proceedings of SPIE - The International Society for Optical Engineering (PART 1 ed., Vol. 7736). [773612] https://doi.org/10.1117/12.857915

The subaru coronographic extreme AO (SCExAO) system : Implementation and performances of the coronographic low order WaveFront sensor. / Vogt, Frédéric; Martinache, Frantz; Guyon, Olivier; Yoshikawa, Takashi; Yokochi, Kaito; Garrel, Vincent; Matsuo, Taro.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7736 PART 1. ed. 2010. 773612.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Vogt, F, Martinache, F, Guyon, O, Yoshikawa, T, Yokochi, K, Garrel, V & Matsuo, T 2010, The subaru coronographic extreme AO (SCExAO) system: Implementation and performances of the coronographic low order WaveFront sensor. in Proceedings of SPIE - The International Society for Optical Engineering. PART 1 edn, vol. 7736, 773612, Adaptive Optics Systems II, San Diego, CA, United States, 6/27/10. https://doi.org/10.1117/12.857915
Vogt F, Martinache F, Guyon O, Yoshikawa T, Yokochi K, Garrel V et al. The subaru coronographic extreme AO (SCExAO) system: Implementation and performances of the coronographic low order WaveFront sensor. In Proceedings of SPIE - The International Society for Optical Engineering. PART 1 ed. Vol. 7736. 2010. 773612 https://doi.org/10.1117/12.857915
Vogt, Frédéric ; Martinache, Frantz ; Guyon, Olivier ; Yoshikawa, Takashi ; Yokochi, Kaito ; Garrel, Vincent ; Matsuo, Taro. / The subaru coronographic extreme AO (SCExAO) system : Implementation and performances of the coronographic low order WaveFront sensor. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7736 PART 1. ed. 2010.
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